Geology, geography and global energy

Scientific and Technical Journal


2020. №4, pp. 59-66

Shakirzyanov Ranas A. - The Gubkin Russian State University of Oil and Gas (National Research University),

Osipov Evgeniy S. - The Gubkin Russian State University of Oil and Gas (National Research University),

Sabine Klarner - Klarenko LLC,

Olaf Klarner - Klarenko LLC,

Sagov Khamzat A. - Klarenko LLC,

This article discusses the possibilities of fault seal analysis using seismic and well data. The studied objects were two large faults in F3 block of the Dutch sector of the North Sea. The evaluation parameters were the Allan diagram and shale gouge ratio (SGR). These parameters were obtained based on geological modeling with a preliminary calculation of the shale volume. The shale cube was calculated by interpolating well data along a set of horizons automatically extracted from the seismic data. To build a structural-tectonic model, a detailed structural interpretation of seismic data was preliminary carried out. An assessment of Allan diagrams and shale gouge ratio allowed the identification of fault zones with insufficient seal quality. In other words, zones with potential hydrocarbon migration have been identified.

Key words: fault seal, Allan diagram, shale gouge ratio, horizon cube, seismic data, North Sea, geological modeling, seismic attribute, North Sea Group, gas migration